Tool-holder.



W. A. PETERSEN.

TOOL HOLDER.

APPLICATION FILED MAY 16, 1910.

Wmm

Patented 0012.4, 1910.

p to raise the tail-end the nut washer will permit: 11, a screw WILLIAMANDREW PETERSEN, OF MONTREAL, QUEBEC, CANADA.

TOOL-HOLDER.

To all whom it may concern:

Be it known that I, WILLIAM ANDREW PETERSEN, a citizen of Canada,residin at 1120 Des Erables avenue, Montreal, rovince of Quebec,(lanada, have invented certain new and useful lm rovements in Tool-Holders, of which the ollowing is a specification.

This invention relates to tool-holders ar' ranged to be operated by handor pneumatically and designed principally for use on metal workinglathes, and the invention will be readily understood from the followingdescription taken in connection with the accompanying drawing in whichFigure 1 is a plan of a tool-holder embodylng my-invention: Fig. 2 arear elevation of the same: and Fig. 3 a vertical section in the planeof line a of Fig. 1.

In the drawing:-1, indicates the toolholding slide of a lathe or similartool-carrying metal-working machine: 2, the toolseatformed thereon; 3,the tool restin on' the tool-seat; 4, the tool-clamp, in the form of alever, disposed over the slide and having one end resting on the tool:5, serrated inserts of hard steel in the lower face of the tool-engagingportion of the clamp: '6, a bolt projecting up from the slide, near thetool, and passing loosely through the clamp: 7, a nut on this bolt,above the clamp, the lower face of this nut being convex: 8, a washerdisposed between the nut and the clamp and having a concave ufpper faceengaged by the nut: 9, a pair 0 rockers pro- Jecting down from thewasher and engaging the upper surface of the clamp, there being one ofthese rockers to the front and one to the rear of the bolt, the twobeing in one line parallel with the tool, and the lower face of thewasher standing clear of the clamp, these rockers forming the fulcrumfor the clamp:

10, a helical spring surrounding the bolt between the slide and theclamp and tending of the clamp as far as threaded down through thetail-end of the clamp, or the end farthest from the tool, the foot ofthis screw abutting 0n the slide, and the upper end of the screw beingprovided with a head for a wrench and also with a nurl 0 permit it to beturned by the fingers: 12, a step of hardened steel inserted in theslide at the foot of screw 11, the engagement of the screw and ste beingof balljoint character: 13, a pair of rods projecting Specification ofLetters Patent. Application filed May 16, 1910. Serial No. 581,702.

Patented ct. 4, 1910.

and journaled in the slide, the long and of the lever being centrallybelow the cylinder, and its cam-end being near screw 11 19, trunnions onthe cam-end of the lever: 20, trunnion-bearings formed in the slidepreferably by means of inserted steel blocks: 21, a cam formed on theouter end of the camlever and engaging under the clamp: 22, a steelinsert in the clamp where it is engaged by the cam: 23, a linkconnecting the long end of the lever with the piston and passing looselythrough a hole in the clamp: and 24, screws employed in securing thecylinder to the clamp.

In Fig. 3 assume, for the present, that screw 11 is absent from thedevlce or that it is screwed up to inactive position. The tool is nowseen to be clamped by the powerful action of piston 17 acting throughthe power multiplying devices represented by the camlever and thefulcrum clamp: In practice I secure, by these transmit-ting devices, arelation of thirty-two to one, that is to say, with a given totalpressure on the piston thirt two times that pressure will be exerted inclamping the tool.

When the pressure is released from over the piston then springs 14depress the tailend of the clamp, thus bringing about the elevation ofthe piston in the cylinder and the release of the tool, spring 10keeping the clamp up against its fulcrum so that the clamp lifts awayfrom the tool, leaving it free for removal. Owing to the very liberalmovement which the device provides for the clamp it is not necessary tomake any adjustments preliminary to the pneumatic clamping of the tool.When a tool is used having a shank materially different in size from onefor which the device has been adjusted, then nut 7 will require to beadjusted to suit the new condition.

The cam can obviously be so shaped as to yield practically a uniformclamplng effect on the tool regardless of ordinary variations v theslide and clamp and tending to in the angular position of the cam lever.The cylinder can be made of an length desired and it is to be observed tat, by reason of its location upon the top of the clam it does not bringabout any interfering si e projections of the device and doesnot'mterfere with the workmans view of the point of the tool.Furthermore, by reason 'of the cylinder bein carried by the clampinstead of by the sli e, the simple removal of nut 7 permits of theready removal of the clamp with all of its accessories.

' If compressed air be not available then screw 11 can be brought intoaction, in an obvious manner, and without necessity for disconnectingany other parts.

I claim 1. A tool-holder comprising, a slide provided with a tool-seat,a bolt carried by the slide near and at right angles to the side of thetool-seat, a clamp en aging loosely over the bolt and having a short endto engage over the tool and a on end pro'ecting away from the bolt andtoo -'seat, a lcrum carried by the bolt and en a 'ng over the clamp, aspring upon the o t slide and clamp, a spring cooperating with ress thelong end of the clamp toward the s ide, and mechanism for forcing thelong end of the clamp in the direction away from the slide, combinedsubstantially as set forth.

2. A tool-holder comprising, a slide provided with a tool-seat, a boltcarried by the slide near and at right angles to the side of thetool-seat, a clamp engaging loosely over the bolt and having a short endto engage over the tool and a lon end projecting away from the bolt andtoo seat, a fulcrum carried by the bolt and engaging over the clamp,means for vertically ad usting the fulcrum on the bolt, a spring uponthe bolt between the slide and clamp, a sprin cooperating with the slideand clamp an tending to press the long end of the clamp toward theslide, and mechanism for forcing the long end of the clamp in thedirection away from the slide, combined substantially as set forth.

3. A tool-holder comprising, a slide provided with a tool-seat, a boltcarried by the slide near and at right angles to the side of thetool-seat, a clamp en aging loosely over.

the bolt and havin a s ort end to engage over the tool and a on endprojecting away from the bolt and too -seat, a collar carried loosely bythe bolt above and free from the clamp, rockers projecting from thecollar down into enga ement with the clam at points in line wit eachother and para lel with the side of the tool-seat, an adjusting nut onthe bolt over the collar, a s ring upon the bolt between the slide and 0amp, a spring coiiperating with the slide and clamp and tending to pressthe long end of between the ing away the clamp toward the slide andmechanism for forcing the long end of the clamp in the direction awayfrom the slide, combined substantially as set forth.

4. A tool-holder comprising, a slide provided with a tool-seat, a boltcarried by the slide near and at right angles to the side of thetool-seat a clamp engaging loosely over the bolt and having a s ort endto engage over the tool and a lon end projecting away from the bolt andtoo -seat, a fulcrum carried by the bolt and engaging over the clamp, aspring upon the t between the slide and clamp, a spr' coo crating withten the slide and clamp an to press the long end ofthe clamp towar theslide, a cylinder mounted upon the to of the clamp and provided with aflui inlet, a piston in the cylinder,'mechanism disposed between theslide and the long arm of the clamp to serve in forcing the long arm ofthe clam in the direction away 'from the slide, an a connection betweenthe piston and said mechanism, combined substantially .as set forth.

5. A tool-holder comprising, a slide provided with a tool-seat, a boltcarried by the slide near and at ri ht angles to the side of thetool-seat, a c amp enga 'ng loosely over the bolt and having a s ort endto engage over the tool and a long end projectfrom the bolt andtool-seat, a fulcrum carried by the bolt and engaging over the clamp, aspring upon the bolt between the slide and clamp, a spring coiiperatingwith the slide and clamp and tending to press the long end of the clamptoward the slide, a cylinder mounted uplon the top of the clamp andprovided wit a fluid inlet, a piston in the cylinder, a cam-levertrunnioned in the slide below the clamp and having its long end belowsaid cylinder, 2. connection between said piston and the long end of thecam-lever, and a cam on the short end of the cam-lever and engagingunder the long arm of the clamp near its end, combined substantially asset forth.

6. A tool-holder comprising, a slide provided with a tool-seat, a boltcarried by the slide near and at right angles to the side of thetool-seat, a clamp engaging loosely over the bolt and having a s ort endto engage over the tool and a lon end projecting away from the bolt andtoo -seat, a fulcrum carried by the bolt and enga g over the clamp, aspring upon the b0 t between the slide and clamp, a sprin cooperatingwith the slide and clamp an ten to press the long end of the clamp towarthe slide, a cylinder mounted upon the to of the tool-seat, a cam-levertrunnioned in said trunnion-bearin s, a connection between said pistonand the ong arm of the cam lever, and a cam on the short arm of thecam-lever and engagin upwardly against the clamp near the en of itslonger arm, combined substantially as set forth.

7 A tool-holder comprising, a slide provided with a tool-seat, a boltcarried by the slide near and at right angles to the side of thetool-seat, a clamp engaging loosely over the bolt and having a short endto engage over the tool and a long end projecting away from the bolt andtool-seat, a fulcrum carried by the bolt and engaging over the clamp,

v a spring upon the bolt between the slide and clamp, a springcooperating with the slide and clamp and tending to press the long endof the clamp toward-the slide, a cylinder mounted uponthe top of theclamp and provided with a fluid inlet, a piston in the cylinder, a pairof open topped trunnion-bearings supported by the slide near the end ofthe long arm of the clamp and having their common axis parallel with theside of the tool-seat, a cam-lever trunnioned in said trunnion-bearin s,a connection between said piston and the ong arm of the cam lever, and acam on the short arm of the cam-lever and engaging upwardly against theclamp near the end of its longer arm, combined substantially as setfortl.

8. A tool-holder comprising, a slide provided with a tool-seat, a boltcarried by the slide near and at right angles to the side of thetool-seat, a clamp e aging loosely over the bolt and having a s ort endto engage over the tool and a lon 'end pro 'ecting away from the boltand too -seat, a 'ulcrum carried by the bolt and enga ing over theclamp, a s ring upon the b0 t between the slide and c amp, a springcooperating with the slide and clamp and tending to ress the long end ofthe clam toward the sli e, pneumatic mechanism a apted to forciblyseparate the longer arm of the clamp from the slide, and manualmechanism independent of the pneumatic mechanism for forcibly separatingthe longer arm of the clamp from the slide combined substantially as setforth.

9. A tool-holder comprising, a slide provided with a tool-seat, a boltcarried by the slide near and at right angles to the side of thetool-seat, a clamp engaging loosely over the bolt and having a short endto engage over the tool and a long end pro'ecting away from the bolt andtool-seat, a ulcrum carried by the bolt and engaging over the clamp, aspring upon the bolt between the slide and clamp, a spring cooperatingwith the slide and clamp and tending to press the long end of the clamptoward the slide, pneumatic mechanism adapted to forcibly separate thelonger arm of the clamp from the slide, and a screw cooperating wit theclamp and slide and forming manual mechanism independent of thepneumatic mechanism for forcibly separating the lon er arm of the clampfrom the slide, combine substantially as set forth. 10. In a tool-holderthe combination of, a slide having a tool-seat, a clamp having atool-engaging member disposed over the seat, a clamp fulcrum connectedto the slide and en aging above the clamp, a spring compresse betweenthe slide and clamp, a s ring urging the non-clam ing end of the 0 amptoward the slide, an means for forcing the non-clamping end of the clampaway from the slide to efl'ect the clamping of the tool.

WILLIAM ANDREW PETERSEN.

Witnesses:

J. HARGOURT W1LLIAMs, JOHN R. SAwrnn.

